release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/bcm63xx/dev-pcmcia.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <asm/bootinfo.h>
  12 #include <linux/platform_device.h>
  13 #include <bcm63xx_cs.h>
  14 #include <bcm63xx_cpu.h>
  15 #include <bcm63xx_dev_pcmcia.h>
  16 #include <bcm63xx_io.h>
  17 #include <bcm63xx_regs.h>
  18
  19 static struct resource pcmcia_resources[] = {
  20         /* pcmcia registers */
  21         {
  22                 /* start & end filled at runtime */
  23                 .flags          = IORESOURCE_MEM,
  24         },
  25
  26         /* pcmcia memory zone resources */
  27         {
  28                 .start          = BCM_PCMCIA_COMMON_BASE_PA,
  29                 .end            = BCM_PCMCIA_COMMON_END_PA,
  30                 .flags          = IORESOURCE_MEM,
  31         },
  32         {
  33                 .start          = BCM_PCMCIA_ATTR_BASE_PA,
  34                 .end            = BCM_PCMCIA_ATTR_END_PA,
  35                 .flags          = IORESOURCE_MEM,
  36         },
  37         {
  38                 .start          = BCM_PCMCIA_IO_BASE_PA,
  39                 .end            = BCM_PCMCIA_IO_END_PA,
  40                 .flags          = IORESOURCE_MEM,
  41         },
  42
  43         /* PCMCIA irq */
  44         {
  45                 /* start filled at runtime */
  46                 .flags          = IORESOURCE_IRQ,
  47         },
  48
  49         /* declare PCMCIA IO resource also */
  50         {
  51                 .start          = BCM_PCMCIA_IO_BASE_PA,
  52                 .end            = BCM_PCMCIA_IO_END_PA,
  53                 .flags          = IORESOURCE_IO,
  54         },
  55 };
  56
  57 static struct bcm63xx_pcmcia_platform_data pd;
  58
  59 static struct platform_device bcm63xx_pcmcia_device = {
  60         .name           = "bcm63xx_pcmcia",
  61         .id             = 0,
  62         .num_resources  = ARRAY_SIZE(pcmcia_resources),
  63         .resource       = pcmcia_resources,
  64         .dev            = {
  65                 .platform_data = &pd,
  66         },
  67 };
  68
  69 static int __init config_pcmcia_cs(unsigned int cs,
  70                                    u32 base, unsigned int size)
  71 {
  72         int ret;
  73
  74         ret = bcm63xx_set_cs_status(cs, 0);
  75         if (!ret)
  76                 ret = bcm63xx_set_cs_base(cs, base, size);
  77         if (!ret)
  78                 ret = bcm63xx_set_cs_status(cs, 1);
  79         return ret;
  80 }
  81
  82 static const __initdata struct {
  83         unsigned int    cs;
  84         unsigned int    base;
  85         unsigned int    size;
  86 } pcmcia_cs[3] = {
  87         {
  88                 .cs     = MPI_CS_PCMCIA_COMMON,
  89                 .base   = BCM_PCMCIA_COMMON_BASE_PA,
  90                 .size   = BCM_PCMCIA_COMMON_SIZE
  91         },
  92         {
  93                 .cs     = MPI_CS_PCMCIA_ATTR,
  94                 .base   = BCM_PCMCIA_ATTR_BASE_PA,
  95                 .size   = BCM_PCMCIA_ATTR_SIZE
  96         },
  97         {
  98                 .cs     = MPI_CS_PCMCIA_IO,
  99                 .base   = BCM_PCMCIA_IO_BASE_PA,
 100                 .size   = BCM_PCMCIA_IO_SIZE
 101         },
 102 };
 103
 104 int __init bcm63xx_pcmcia_register(void)
 105 {
 106         int ret, i;
 107
 108         if (!BCMCPU_IS_6348() && !BCMCPU_IS_6358())
 109                 return 0;
 110
 111         /* use correct pcmcia ready gpio depending on processor */
 112         switch (bcm63xx_get_cpu_id()) {
 113         case BCM6348_CPU_ID:
 114                 pd.ready_gpio = 22;
 115                 break;
 116
 117         case BCM6358_CPU_ID:
 118                 pd.ready_gpio = 18;
 119                 break;
 120
 121         default:
 122                 return -ENODEV;
 123         }
 124
 125         pcmcia_resources[0].start = bcm63xx_regset_address(RSET_PCMCIA);
 126         pcmcia_resources[0].end = pcmcia_resources[0].start +
 127                 RSET_PCMCIA_SIZE - 1;
 128         pcmcia_resources[4].start = bcm63xx_get_irq_number(IRQ_PCMCIA);
 129
 130         /* configure pcmcia chip selects */
 131         for (i = 0; i < 3; i++) {
 132                 ret = config_pcmcia_cs(pcmcia_cs[i].cs,
 133                                        pcmcia_cs[i].base,
 134                                        pcmcia_cs[i].size);
 135                 if (ret)
 136                         goto out_err;
 137         }
 138
 139         return platform_device_register(&bcm63xx_pcmcia_device);
 140
 141 out_err:
 142         printk(KERN_ERR "unable to set pcmcia chip select\n");
 143         return ret;
 144 }